接触网作业车的保养分为几种？
["\u63a5\u89e6\u7f51\u4f5c\u4e1a\u8f66\u7684\u4fdd\u517b\u5206\u4e3a\u65e5\u5e38\u4fdd\u517b\uff0c\u5b9a\u671f\u4fdd\u517b\uff0c\u8d70\u5408\u671f\u4fdd\u517b\uff0c\u6362\u5b63\u4fdd\u517b\u3002"]
接触网作业车的保养分为几种？
["\u63a5\u89e6\u7f51\u4f5c\u4e1a\u8f66\u7684\u4fdd\u517b\u5206\u4e3a\u65e5\u5e38\u4fdd\u517b\uff0c\u5b9a\u671f\u4fdd\u517b\uff0c\u8d70\u5408\u671f\u4fdd\u517b\uff0c\u6362\u5b63\u4fdd\u517b\u3002"]